* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

:root {
  --primary-color: #2563eb;
  --success-color: #16a34a;
  --danger-color: #dc2626;
  --gray-color: #6b7280;
  --light-gray: #f3f4f6;
  --border-color: #e5e7eb;
  --white: #ffffff;
}

body {
  background-color: #f9fafb;
  color: #111827;
  line-height: 1.5;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 登录注册页 */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  padding: 32px;
  width: 100%;
  max-width: 400px;
}

.auth-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  color: var(--primary-color);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 14px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.btn-success {
  background-color: var(--success-color);
  color: var(--white);
}

.btn-danger {
  background-color: var(--danger-color);
  color: var(--white);
}

.btn-small {
  width: auto;
  padding: 6px 12px;
  font-size: 14px;
}

.auth-link {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--gray-color);
}

.auth-link a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

/* 头部导航 */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-info {
  font-size: 14px;
  color: var(--gray-color);
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.stat-card {
  background: var(--white);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.stat-title {
  font-size: 14px;
  color: var(--gray-color);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
}

.income {
  color: var(--success-color);
}

.expense {
  color: var(--danger-color);
}

.balance {
  color: var(--primary-color);
}

/* 表单区域 */
.form-section {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

/* 筛选区域 */
.filter-section {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
  align-items: center;
}

.filter-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-label {
  font-size: 14px;
  font-weight: 500;
}

.filter-input, .filter-select {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
}

/* 表格 */
.table-wrapper {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  background: var(--light-gray);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  color: var(--gray-color);
}

.table td {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  font-size: 14px;
}

.table tr:hover {
  background: var(--light-gray);
}

.table-actions {
  display: flex;
  gap: 8px;
}

/* 图表区域 */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
  margin: 24px 0;
}

.chart-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.chart-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin: 24px 0;
}

.pagination-info {
  font-size: 14px;
  color: var(--gray-color);
}

/* 弹窗 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-hidden {
  display: none;
}

.modal-content {
  background: var(--white);
  border-radius: 12px;
  width: 100%;
  max-width: 500px;
  padding: 24px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-color);
}

/* 响应式 */
@media (max-width: 768px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .table-wrapper {
    overflow-x: auto;
  }

  .table {
    min-width: 600px;
  }
}